It’s Black Hole week, so NASA decided to release a theme music for black hole.
What is a black hole?
A Black hole is a place in space where the gravitational force is very high. Nothing can go beyond the black hole, there is so much of energy present there. No laws of physics work here. Now a satellite has recorded the sound of Black Hole. NASA has now released it after processing it according to the hearing of the human ear. The black hole is 200 million light years away from Earth. It is part of the center of the Perseus galaxy cluster, spread over a width of 11 million light years. This blackhole has been associated with sound since 2003. That’s because astronomers found that pressure waves emanating from the black hole heated the cluster’s gases.
In some ways, this sonification is unlike any other done before because it revisits the actual sound waves discovered in data from NASA’s Chandra X-ray Observatory. The popular misconception that there is no sound in space originates with the fact that most of space is essentially a vacuum, providing no medium for sound waves to propagate through. A galaxy cluster, on the other hand, has copious amounts of gas that envelop the hundreds or even thousands of galaxies within it, providing a medium for the sound waves to travel. More specifically, it’s the melody of a vast, monstrous chasm that sits more than 200 million light-years away from Earth.
If a black hole erupts in space and no one is around to observe it, does it make a sound?— NASA (@NASA) May 5, 2022
Not to worry; the @ChandraXray Observatory is here with new #BlackHoleWeek sonifications from galaxy clusters far, far away. Listen: https://t.co/yGu0RuP7TX pic.twitter.com/6rAgJafmAa
The Perseus galaxy cluster has long been associated with sound. Astronomers found out that ripples were formed in the cluster’s hot gas due to the pressure waves sent out by the black hole. These ripples could be translated into a note of some 57 octaves below middle C, which is not audible to human ears. So, the new sonification by NASA added more notes to this ‘black hole sound machine’ making it audible.
We have always learned that most of the space has vacuum and thus it doesn’t offer any medium for the sound to travel. However, a galaxy cluster, like the Perseus galaxy, has ample amount of gas that has thousands of galaxies within it. This gas provides a medium for the sound to propagate through. Besides the Perseus galaxy cluster, NASA has also released another sonification of a famous black hole known as Messier 87 or M87.
To create this sonification of Perseus, astronomers extracted the data in radial directions, i.e., outwards from the center. They then synthesized the signals into the range of human hearing by scaling them upward by 57 and 58 octaves above their true pitch.
This voice is better than the previous voices. NASA said that the most popular misconception is that there is no sound in space, because space is completely vacuum and there is no medium for sound waves to travel. But on the far side, a galaxy cluster has abundant gas in which it can contain thousands of galaxies, these allow the sound waves to move forward.
This track, however, is only so beautiful because it’s not exactly the product of pure, isolated astronomical data sonification like the music of Perseus’ void. It comes from three different vessels of data — Chandra x-rays, optical light from Hubble and radio waves from the Atacama Large Millimeter Array in Chile — overlaid upon one another.
The Event Horizon Telescope was able to generate the image by using eight radio telescopes from across the planet. Synchronizing these telescopes helped produce the image above. Though it looks a little like an out-of-focus campfire, it was a breakthrough result: The first time humans had set eyes on the universe’s most fascinating and confounding objects.